65444501 has 2 divisors, whose sum is σ = 65444502. Its totient is φ = 65444500.

The previous prime is 65444473. The next prime is 65444507. The reversal of 65444501 is 10544456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65189476 + 255025 = 8074^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 65444501 - 2⁶ = 65444437 is a prime.

It is a super-2 number, since 2×65444501² = 8565965422278002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65444507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32722250 + 32722251.

It is an arithmetic number, because the mean of its divisors is an integer number (32722251).

Almost surely, 2^65444501 is an apocalyptic number.

It is an amenable number.

65444501 is a deficient number, since it is larger than the sum of its proper divisors (1).

65444501 is an equidigital number, since it uses as much as digits as its factorization.

65444501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 65444501 is about 8089.7775618369. Note that the first 3 decimals coincide. The cubic root of 65444501 is about 402.9870159006.

Adding to 65444501 its reverse (10544456), we get a palindrome (75988957).

The spelling of 65444501 in words is "sixty-five million, four hundred forty-four thousand, five hundred one".